Cryo-ToF-SIMS study of sodium isobutyl xanthate adsorption on sulfide minerals

Lai, Hao; Shen, Peng-Nian; Liu, Ruizeng; Liu, Dianwen; Wen, Shuming

doi:10.1016/j.mineng.2022.107723

Cited by 10 publications

(2 citation statements)

References 41 publications

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“…Meanwhile, the oxygen in the pulp was reduced to OH - on surface. The related reaction can be expressed as follows [41, 42]:…”

Section: Resultsmentioning

confidence: 99%

Dual Role of Fe²⁺ in the Galena Flotation and Influence on Selective Separation

Yang,

Wang,

Xie

et al. 2023

Adsorption Science & Technology

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Fe ions, as one of the unavoidable metal ions, are present in flotation pulp as ferric and ferrous species, and the effect of ferric species on the flotation behavior of sulfide minerals has been widely discussed in the above literatures. However, the effect of ferrous species has rarely been noticed. In this paper, the effect of ferrous species on the flotation behavior and surface characteristics of galena was investigated by using microflotation, zeta potential measurements, X-ray photoelectron spectrometer (XPS) analysis, and density functional theory (DFT) calculations. Microflotation tests indicated that the flotation recovery of galena with potassium butyl xanthate (KBX) as collector was significantly decreased with the addition of Fe2+ in the pulp, and the recovery was further decreased with increasing dosage of Fe2+. In addition, the finer the galena particles, the greater the decrease in flotation recovery. Zeta potential analysis illustrated that the isoelectric point (IEP) was shifted from 4.4 to 5.8 due to the adsorption of ferrous hydroxyl complexes on the galena surface and the zeta potential. XPS surface analysis suggested that the surface oxidation of galena was alleviated by the consumption of O2 in the pulp, which reduced the adsorption of the collector KBX on and the oxidation of xanthates to dixanthogens. Density functional theory (DFT) calculations confirmed that the ferrous hydroxyl complex FeOH+ could be adsorbed on the galena surface by interactions between Fe and S atoms.

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“…Meanwhile, the oxygen in the pulp was reduced to OH - on surface. The related reaction can be expressed as follows [41, 42]:…”

Section: Resultsmentioning

confidence: 99%

Dual Role of Fe²⁺ in the Galena Flotation and Influence on Selective Separation

Yang,

Wang,

Xie

et al. 2023

Adsorption Science & Technology

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“…Moreover, considering that pyrrhotite is a sulfide mineral, we needed to verify the activation effect of Fe 2+ on pyrrhotite. BX is a commonly used collector for sulfide minerals, and isobutyl xanthate was selected for subsequent calculations in this calculation, which is also a kind of butyl xanthate, corresponding to the microflotation experiment [40][41][42][43][44]. BX should be added in the future to further study the activation of pyrrhotite by Fe 2+ .…”

Section: Calculation Methodsmentioning

confidence: 99%

Activation Mechanism of Fe2+ in Pyrrhotite Flotation: Microflotation and DFT Calculations

Song,

Tong,

Dai

et al. 2024

Molecules

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In industrial manufacturing, pyrrhotite(Fe1−xS), once depressed, is commonly activated for flotation. However, the replacement of CuSO4 is necessary due to the need for exact control over the dosage during the activation of pyrrhotite, which can pose challenges in industrial settings. This research introduces the use of FeSO4 for the first time to efficiently activate pyrrhotite. The impact of two different activators on pyrrhotite was examined through microflotation experiments and density functional theory (DFT) calculations. Microflotation experiments confirmed that as the CuSO4 dosage increased from 0 to 8 × 10−4 mol/L, the recovery of pyrrhotite initially increased slightly from 71.27% to 87.65% but then sharply decreased to 16.47%. Conversely, when the FeSO4 dosage was increased from 0 to 8 × 10−4 mol/L, pyrrhotite’s recovery rose from 71.27% to 82.37%. These results indicate a higher sensitivity of CuSO4 to dosage variations, suggesting that minor alterations in dosage can significantly impact its efficacy under certain experimental conditions. In contrast, FeSO4 might demonstrate reduced sensitivity to changes in dosage, leading to more consistent performance. Fe ions can chemically adsorb onto the surface of pyrrhotite (001), creating a stable chemical bond, thereby markedly activating pyrrhotite. The addition of butyl xanthate (BX), coupled with the action of Fe2+ on activated pyrrhotite, results in the formation of four Fe-S bonds on Fe2+. The proximity of their atomic distances contributes to the development of a stable double-chelate structure. The S 3p orbital on BX hybridizes with the Fe 3d orbital on pyrrhotite, but the hybrid effect of Fe2+ activation is stronger than that of nonactivation. In addition, the Fe-S bond formed by the addition of activated Fe2+ has a higher Mulliken population, more charge overlap, and stronger covalent bonds. Therefore, Fe2+ is an excellent, efficient, and stable pyrrhotite activator.

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Microscale exploration of the sulfidization flotation theory in malachite

Zhuo,

Wang,

Shen

et al. 2024

Applied Surface Science

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Cryo-ToF-SIMS study of sodium isobutyl xanthate adsorption on sulfide minerals

Cited by 10 publications

References 41 publications

Dual Role of Fe²⁺ in the Galena Flotation and Influence on Selective Separation

Dual Role of Fe²⁺ in the Galena Flotation and Influence on Selective Separation

Activation Mechanism of Fe2+ in Pyrrhotite Flotation: Microflotation and DFT Calculations

Microscale exploration of the sulfidization flotation theory in malachite

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Cryo-ToF-SIMS study of sodium isobutyl xanthate adsorption on sulfide minerals

Cited by 10 publications

References 41 publications

Dual Role of Fe2+ in the Galena Flotation and Influence on Selective Separation

Dual Role of Fe2+ in the Galena Flotation and Influence on Selective Separation

Activation Mechanism of Fe2+ in Pyrrhotite Flotation: Microflotation and DFT Calculations

Microscale exploration of the sulfidization flotation theory in malachite

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Product

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Dual Role of Fe²⁺ in the Galena Flotation and Influence on Selective Separation

Dual Role of Fe²⁺ in the Galena Flotation and Influence on Selective Separation